EN ISO 6709:2009

Introduction
1 Scope
2 Conformance
3 Normative references
4 Terms and definitions
5 Abbreviated terms
6 Requirements for the representation of geographic point
  location
7 Representation of geographic point location
Annex A (normative) - Conformance and abstract test suite
Annex B (informative) - Latitude and longitude coordinates
                        are not unique
Annex C (normative) - UML description for representation of
                      geographic point locations
Annex D (informative) - Representation of latitude and longitude
                        at the human interface
Annex E (informative) - Latitude and longitude resolution
Annex F (informative) - Utilization of Geographic Point Locations
Annex G (informative) - Examples of XML representation
Annex H (informative) - Text string representation of point location
Bibliography

ISO 6709:2008 is applicable to the interchange of coordinates describing geographic point location. It specifies the representation of coordinates, including latitude and longitude, to be used in data interchange. It additionally specifies representation of horizontal point location using coordinate types other than latitude and longitude. It also specifies the representation of height and depth that can be associated with horizontal coordinates. Representation includes units of measure and coordinate order.ISO 6709:2008 is not applicable to the representation of information held within computer memories during processing and in their use in registers of geodetic codes and parameters.ISO 6709:2008 supports point location representation through the eXtensible Markup Language (XML) and, recognizing the need for compatibility with the previous version of this International Standard, ISO 6709:1983, allows for the use of a single alpha-numeric string to describe point locations.For computer data interchange of latitude and longitude, ISO 6709:2008 generally suggests that decimal degrees be used. It allows the use of sexagesimal notations: degrees, minutes and decimal minutes or degrees, minutes, seconds and decimal seconds.ISO 6709:2008 does not require special internal procedures, file-organization techniques, storage medium, languages, etc., to be used in its implementation.